The present invention relates to the field of solvent oil preparation, and discloses a method for producing isoparaffin solvent oil from Fischer-Tropsch synthesis naphtha, and isoparaffin solvent oil obtained through the method. The method comprises: (1) carrying out an alcohol dehydration reaction on Fischer-Tropsch synthesis naphtha in the presence of a catalyst to prepare an olefin; (2) carrying out a polymerization reaction on the product obtained in the step (1) in the presence of a polymerization catalyst; (3) carrying out a hydrogenation reaction on the product obtained in the step (2) in the presence of a hydrogenation catalyst; and (4) cutting the distillate with the initial boiling point of not less than 160 DEG C and the end boiling point of not more than 340 DEG C in the product obtained in the step (3) through fractionation to obtain the isoparaffin solvent oil. According to the present invention, with the method, the yield and the purity of the isoparaffin solvent oil are high, the isoparaffin solvent oil product obtained through the method has characteristics of light color, good oxidation stability and good thermal stability, and the contents of aromatic hydrocarbons, sulfur and nitrogen compounds in the obtained isoparaffin solvent oil product can be negligible.